Research On Angle Cooperation Routing Protocol Of Wireless Sensor Networks

In recent years, Along with the wireless communication technology、embedded computing technology and sensor technology rapid development and increasingly mature, The Wireless Sensor Network compose of low cost、low power consumption and multi-functional sensor nodes get rapid development. Wireless sensor network with a large number of sensor nodes that random threw in the monitoring areas constitute of more hop and self-organization network system by wireless communications. Wireless sensor network in the military、disaster warning and relief、space exploration、 environment and weather monitoring、intelligent household、industrial production control and business area has wide application prospects. Cooperative diversity as virtual multiple antenna technology that can effectively resist wireless multipath fading is applied to Wireless Sensor Network.The nodes that redundant distribution in network have one or more partners, Each node can use of partners’and its own space channels by time share in the process of the information transmission to get certain spatial diversity gain. Research shows that cooperative diversity can greatly reduce the energy consumption of self-organization network. The cooperation routing based on the cooperative communication is a new research field.This paper mainly from the following several aspects to research:(1) According to multipath fading influence of wireless communication, This paper introduces the principle of cooperative diversity, detailed introduces and analysis three key issues of cooperative diversity realization that is how to select cooperation partner、 how and when relay node to collaborate. For wireless sensor network of its own characteristics, research on the geographical location information routing protocol, In-depth analysis of basic forwarding mechanism of the geographical location information routing protocol. Through compare several traditional geographic routing protocols, Focuses on elaborating the angle random routing protocol.(2) Based on the angle random forwarding routing protocol and cooperation communication, Focusing on the research of angle cooperative routing protocol. This paper has found the distance between the nodes is an important influence factor in the best relay selection by the simulation of interrupt probability of angle cooperation routing protocol. Through doing the experiments of statisticsing bit error rate and data packet loss rate in wireless transmission process on the platform of ZigBee wireless network professional development system to verify the simulation results.(3) According to distance on the influence of the best relay selection in angle random forwarding routing process, Improved the relay node selection algorithm of angle random forwarding routing protocol. Based on the evaluation standard of best relay selection for original angle random forwarding routing protocol, Adding distance factor to relay select condition, Combines with angle random forwarding routing and greedy perimeter stateless routing, Presented a improvement relay selection algorithm.Using greedy algorithm to establish routing in the same angle information.(4) Analysis and compare the performance of the improvement relay selection algorithm and angle random forwarding routing selection algorithm by the NS2network simulation and verify the simulation results by the communications packet loss rate statistics experiment. The RSSI ranging experiment further verify RSSI ranging is an effective method to obtain the relative position information between the nodes. The simulation and experiment show that the improvement relay selection algorithm has better network performance.